Your strange friend flies past you in a relativistic spacecraft holding a meterstick and a clock.The meterstick appears too _____ to you,and the clock appears _____ to you.
A)short; slow
B)long; slow
C)short; fast
D)long; fast
E)short; normal

Question

Quizplus · Accepted Answer

According to special relativity theory, as an object approaches the speed of light, its length appears shorter and time appears to slow down. This effect is known as time dilation and length contraction. Therefore, to the observer, the meterstick will appear shorter (length contraction) and the clock will appear to tick slower (time dilation). Choice A fits this description.

Your Strange Friend Flies Past You in a Relativistic Spacecraft